fix: add Claude 5 models to output-price table - #744
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priceForModel() matched only claude-3/4 prefixes, so every Claude 5 id returned null and formatStats dropped the "Est. saved (USD)" line and the statusline savings suffix. Sessions on claude-opus-5 (the current Claude Code default) showed no savings estimate at all. Adds Opus 5 ($25/M), Sonnet 5 ($15/M list), Fable 5 and Mythos 5 ($50/M). Prefixes do not overlap the existing claude-*-4 entries, so Claude 4 pricing is unaffected — pinned by an assertion. Also covers the bracket-suffixed id Claude Code actually reports for the 1M-context variant (claude-opus-5[1m]), which is what surfaced this. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_019TUPyH44JsgchW1iJ5DZ6K
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Problem
priceForModel()matches by prefix againstclaude-3*andclaude-4*only.Every Claude 5 model id therefore falls through to
null, which makesformatStats()drop theEst. saved (USD)line and the statusline savingssuffix entirely.
Since
claude-opus-5is the current Claude Code default, this means/caveman-statsshows no dollar estimate at all for most users right now —silently, with no error.
Fix
Adds the four Claude 5 entries at the top of
MODEL_OUTPUT_PRICE_PER_M:Sonnet 5 is listed at its
$15/Mrate card; there is an introductory$10/Mprice through 2026-08-31, noted in a comment rather than hard-codedso the table doesn't silently expire.
The new prefixes do not overlap the existing
claude-*-4entries, so Claude 4pricing is untouched — pinned by an assertion in the new test.
Tests
New case
priceForModel covers the Claude 5 generationintests/test_caveman_stats.js, including the bracket-suffixed id Claude Codeactually reports for the 1M-context variant (
claude-opus-5[1m]) — thatvariant is what surfaced the bug.
node --test tests/*.js→ 7/7 files passnpm test(installer suite) → 112/112 pass🤖 Generated with Claude Code
https://claude.ai/code/session_019TUPyH44JsgchW1iJ5DZ6K